Machine for operating on shoe parts



3 Sheets-Sheet J. B. HADAWAY MACHINE FOR OPERATING ON SHOE PARTS Filed May 1 9, 1924 July 16, 1929.

July 16, 1929. J. B. HADAWAY MACHINE FOR OPERATING ON SHOE PARTS l 3 Sheets-Sheet Filed May 19 July 16, 1929. J. B. HADAWAY MACHINE FOR OPERATING ON SHOE PARTS Filed May 19, 1924 -3 Sheets-Sheet 3 Patented July 16, 1929.

ilAES PATENT OFFICE.

JOHN B. HADAWAY, OF SWAMPSCOTT, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

BIACHINE FOR OPERATING ON SHOE PARTS.

Application filed May 19,

This invention relate to machines for the invention, in its broader aspects,

s operatiugg` on blanks l particularly to inachines for treating shoe parts. Altliourn plicable. to the handline ot blanks fr eral, the invent-ion is h n slioivn finish the breast surtaces et the heels bv 'rst trimming t-liein to predeteriniiiet'i shape and then scouringthe surtaces. Certain shoe parts ot a similar shape, which are to be treated in large quantities, may conveniently be handled by conveyors, tlie'lparts being positioned on the conveyors and presented to a. succession ot toolsand then automatically ejected. Such a niachine is especialy adapted, tor example, for finishing' the breast surtaces o'li unattaclied composite heels, each composed ot a leather base and a rubber top litt, Which are constructed as described in United States Letters Patent No. 1,613,096, granted January l, 1927, upon my application. A heel ot the type therein described comprises an outer cushion of rubber and a et leather or other suitable material, the tvvo portions beingy arranged tor and expe ditious ssciiiblag'e by the aid ot coacting` protubgances and cavities upon thereon tacting` surfaces ot the tivo portions. Breterablv the protuberances ivill be :torined uponl the leather heel base and the cavities iii the rubber portion, and addition the heel seat tace VWill be provided With holes to assist in the proper location orP the heel upon a carrier.

lVitli a. vieiv to facilitating` operativi@1 on blanks such as heels et the type re'lierred to, one object of the present: invention is to provide an improved machin-e o t the.. type having` conveyor, which machine Will be organized to present such blanks to a plurality ot operating tools in succession and particularly adapted tor the expeditious location ot the blanks upon the conveyor, and the automatic clamping, treatment, unclanipiiig and ejection ol the blanks.

1924. Serial No. 714,398.

The expeditious positioning ot blanks,

such as the composite heels described in my above-nientioned application, may be secure-f in a manner already known, by the provision of jig pins upon the conveyors, 't'or example endless carriers, ivliich are adapted to enter the jig holes in the heels. As is common in machines of this type, clampin devices may be provided to hold the blanks after they have been positioned, and prei' erably these clamping devices are arranged automatically to be moved into clamping position and rel-eased therefrom by means operable by the rotationlot' a turret upon which the carriers are mounted. lVlien pins are provided upon a Work carrier to enter holes in the blank, as before indicated, the blanks, after the cla-mp upon the carrier has been released, may cling to the pins. In this aspect, one feature of the invention relates to an ejecting device ivhereby the blanks may be separated troni the pins and to another ejecting device operable by movement with respect to a lined cani, said latter ejectiiig device being arranged to push the blank out of the clamping device. Preferably the arrangeincni. ivill be such that the clair-.ipine` device. the ejector for lifting the blank off the jig pins, and the ejector for pushing the blank laterally out of the clamping device Will bel operated in timed relation to one another.

The conveyor in such a machine may convenient-ly take the form ot an annular turret similar to that described in Letters Pat-- entI of the United States No. 1,514,615, granted November' 11, 1924, upon my copending application, with a plurality ot rotatable tools mounted upon axes substantially perpendicular to the plane of rotation oi the turret, or parallel to the axis oit ro- 'atioii of the turret, inside the annulus. There one of these tools is a scouring tool and provided with a. surface of abrasive mae terial, the tool diameter inay become reduced in use. and the tool may become ineffective Where the path ot movement with respect to the tool is maintained constant even though the remainingabrasive material is capable of still further use. Accordingly, still another feature of the invention relates to means for adjusting the center of rotation of the turret with respect to the tools so that the path of movement of the work is changed, the wearing away of the tool is compensated for, and its effect upon successive pieces of work kept substantially constant. A

In accordance with still. other features of the invention, the preferred embodiment herein shown and described provides a driving motor for the turret whose axis is substantially parallel to the axis of rotation of the turret, said motor being connected to the turret by a novel arrangement which is so arranged that the driving connections are not disturbed by the adjustment of the ccnter of rotation of the turret as above described. These driving connections are also constructed to cause the turret to move through predetermined fractions of a rotation and then to dwell for a predetermined period intermediate between each of said fractional movements. Preferably the driving connections between the source of power and the scouring tool are such'that axial movement is imparted to said tool as well as rotating movement so as to distribute the wear of the work across the width of the periphery of the tool. This preferred embodiment of the invention is described in the accompanying specification and shown in the drawings, in which Fig. 1 is a front elevation of the machine;

Fig. 2 is a side elevation with part-s broken away;

Fig. 3 is a plan view;

Fig. 4; is a` detail section showing a controlling` cam; and

Fig. 5 is a radial section through the turret taken at the center of one of the clamping devices.

The illustrated machine is a motor driven machine provided with an annular turret upon which are mounted several work carriers provided with clamping devices. A plurality of tools, such as a rotary trimming tool and a rotary scouring tool, are located within the annulus in position to treat a portion of the periphery of the heels, such as the breast surfaces, as they are presented to these tools during rotation of the turret. Each of the carriers is slidably mounted upon the turret for movement radially thereof under the control of stationary cams to determine t-he relative path of traverse of the tools and the heels and each of them has a supporting surface provided with pins by means of which the leather base of the composite heel may be located accurately by an inexperienced operator. lf the heel is of the type described in my above-mentioned `Letters Patent No. 1,613,096, then the rubber section may also be located expeditiously by the use of the coacting protuberances and cavities upon the contacting` surfaces thereof. The turret is rotated intermittently by novel connecting means between the driving motor and the turret, which latter is arranged to carry a heel from the position at which it was inserted in the work carrier to a position beyond the rotary trimming tool and then to dwell. As the carrier left the starting position and approached the trimming tool, the clamping device was automatically brought into contact with the rubberI section of the heel and will be maintained in contact until various operations have been finished and the heel is ready to be ejected. After this dwell, the turret is again rotated for a fractional movement and carries the heel past the rotary scouring tool which is also reciprocated vertically along its axis. Another' dwell is then provided which permits the operator to insert a fresh piece of work in the carrier which has come opposite his position, after which the particular heel under consideration is moved forward, its clamp is released, and ejecting device lifts the heel off the jig pins and then another ejecting device slides it laterally out of the clamping device, which latter is then ready to receive a new piece of work when it approaches the operators position.

The base of the machine is in the form of a substantially rectangular hollow standard provided at one side with an opening 1.2 (Fig. 2) adapted normally to be closed by means of a door 14. lVithin the standard 10 is a bracket 16 supporting an electric motor 18 which is connected by means of an Oldham coupling 20 to a vertical shaft 22 on the yupper end of which is removably secured a heel breast trimming cutter 24 (Fig. 3). The motor 18 may conveniently be controlled by means of a switch 3() (Fig. 1) mounted on the exterior of the casing atthe front of the machine. Adjacent to this switch is another switch 32 for controlling an electric motor 34 which fastened to the base of the machine within the casing 10. A vertical shaft of this motor is also connected by means of an Oldham coupling 36 (Fig. l) to a vertical shaft 38 through a sliding connection 40 (Fig. 2), thus allowing both rotation around a vertical aXis of the upper portion of the shaft and reciprocation along said axis. Mounted on the upper end of the shaft 38 is a scouring wheel 42 (Fig. 3) having a peripheral face considerably wider than the thickness of the heel to be scoured.

For economy of operation it is desirable to utilize all portions o-f the peripheral surface of this scouring wheel and. l have, therefore, pro-vided a mechanism for reciprocating the shaft 3S, which carries the scouring wheel, back and forth along its axis se tha various portions of the vertical peripheral surface of the scouring tool are presented to the work. rlhis mechanism may be best seen in Fig. 2. It will be seen to comprise a curved lever 44 pivoted at 46 onr a bracket 48 attached to the frame of the machine. The lever 44 has an outer forked end provided with i'olls engaging an annular groove 50 formed on Vthe lower end of the worm 52 which is pinned to the upper portion of the shaft 38. This worm 52 is arranged for engagement with a gear 54 rotatably mounted on a stub shaft fixed in the frame of the machine. Eccentrically attached at 56 to the hub of this worm gear 54 is a link 58 which is connected at its lower end to the central portion of the curved lever 44. As the worm 52 is rotated by the motor it will rotate the worm gear 54 and thereby cause an oscillation of the lever 44 which will move the worm and its shaft 38 up and down at the same time that it is being rotated, thus giving the desired movement to the scouring wheel 42.

The upper part of the casing 10 is provided with transverse horizontal guideways 60 (Fig. 1) in which there is slidably mounted a turiet-carrying slide 62 connected by means of an overhanging bracket 64 (Fig. 2) to a hand wheel 66 having a threaded connection 68 with the frame of the machine so that the slide 62 and all parts` supported thereby may be given aslight adjusting movement transversely of the top of the casing. As will later appear, this movement is for the purpose of bringing the work up to the scouring wheel 42 as the wheel wears away by adjusting the center of rotation of the turret to change the relation of the path of movement of the work with respect to the tool. The effective diameter of the wheel 42 may become reduced by the wearing away of the abrasive cover or by reason of a matting down or wearing away of the felt or other resilient backing material. Because of the relative location of the rotary trimming cutter 24, spaced about 120 degrees from the scouring wheel, as will appear from an inspection of Fig. 3, adjustment of this slide and its associated parts will not affect to any considerable extent the relation of the work and the heel breasting knife.

For supporting the turret, there is bolted to the slide 62 an annular ring 69 (Fig. 2) which supports an annular block 70 having a cam track 72 formed in its peripheral. face. A conveyor in the form of a rotating annular turret 74 is formed near its inner edge with a depending sleeve 7 5 (Figs. 2 and 3) which passes through the opening in the cam block 70 and has a ring gear 98 (Fig. 3) secured to its lower end. The weight of the rotating parts is borne by ball bearings 77 in a race 79 between the ring gear and the slide 62. A central cover plate 81 held in place on a bracket 91 by the screw 93 is used to keep chips and dust away from the driving mechanism.

The turret 74 serves as a. support for a plurality of work-holding devices, hereinafter described, or carriers. In the illustated machine there are three sets of workholding devices or carriers and the machine is oganized to rotate the turret through 120 degrees and then to cause the same to dwell, whereupon the turret will proceed through another arc of 120 degrees to bring each piece of work past its respective tool. The dwells of the turret and carriers occur when no work is being done by the tools upon the heels and permit insertion of a heel in one of the carriers while it is at rest. This movement of the turretis effected by means of the arrangement of its driving gears, as illustrated in Figs. 2 and 3, from which it will be seen that a horizontal shaft (Fig. 2) is mounted in bearings in the frame of the machine. The shaft is driven by means of a worm 82 upon the motor shaft 38 meshing with a gear 84 (Fig. 3) fixed to the horizontal shaft 80. Slidably mounted along a spline on this horizontal shaft is a worm 86 (Fig. 2) formed at one end with an annular groove 88 (Fig. 3) and meshing on its face with a worm gear 90 (Fig. 2) mounted on a vertical jack shaft 92. Intermediate between the upper and lower parts of the jack shaft 92 is an Oldham coupling 94 and on the upper end of the shaft is a spur gear 96 3) meshing with the ring gear 98 which is operatively connected to the turret to cause rotation thereof.

To provide for the desired dwells in the turret rotation, a bell crank lever 100 (Fig. 2) is pivoted at 102 in a bracket 104 formed on the frame of the machine and this lever is bifurcated at its other end and provided with blocks 106 engaging the annular groove 88 in the end of the worm 86. Pivotally attached to the bell crank lever 100 at an intermediate point 110 is an arm 112 (Fig. 3) carrying a roller 114 arranged to ride in a groove 116 of a cam 118 (Fig. 2) fixed to the jack shaft 92. It will be seen that rotation of the jack shaft through the interposed worms and gears will cause the cam to oscillate the bell crank lever 100 and thereby to slide the worm 86 along the horizontal shaft 80 so that at intervals its rotative effect upon the gear 90 will beneutralized and the turret 74 will remain stationary.

For the purpose of holding the work, the turret is provided at spaced intervals with carriers comprising plates 120 (Fig. 1) which are slidably mounted in radial grooves 122 formed in the surface of the turret, said plates being retained in the grooves by means heel.

of screw-attached removable retaining members 124 (Fig. 2).Y Springs 126 supported in lugs 128 formed on the lower side of the turret are arranged to bear against depending members 180 formed on the lower side of the slidable plates and these members are provided with rollers 182 adapted to bear against the upper part of the peripheral face of the cam block 70. This block 7 0 may be provided with inset cam members 134 (Fig. 4) adjacent to the two operating tools and the surface of the insetv cam members 134 may be so designed as to cause or allow a radial movement of the work-supporting plates under the action of the springs 126. By this arrangement, any variation between the curvature of the breast of the heel and the curvature of the turret will be compensated for andthe proper action of the tools along this curved breast surface of the work properly carried out.

Inasmuch as the breast surface of the heel may not be exactly perpendicular to the tread surface thereof the upper face of each supporting plate 120 will usually be provided with a sloping projection (Fig. 2) which has on its upper surface jig pins 142 adapted to eoact with the corresponding jig holes in the heel seat surface of a heel to enable the operator readily to locate the heel on this member 140 and to predetermine the position for the subsequent treatment of the This construction not only ensures that the heel will be located in a definite positionv with relation to the clamp, so that the heel breast maybe given a definite treatment by relative movement between the clamp and the treating tools, but also ensures against .accidental movement of the heel between the clamping members in a plane parallel to the tread face while it is being treated. After the operator has placed the rubber section 210 of the heel securely on the top of the leather section 246 thereof, and located the parts in superposed relation er approximate register, the heel will be suitably Vclamped against the projection 140 by lmeans of a clamping plate 144 (Fig. 1')

slidably mounted on upstanding pins 146 which are held by brackets formed on each sliding plate 120.

` Slidably secured in the upper surface of the turret 74 are studs 150 (F ig. 2) serving as supports for sleeves 152 slidably mounted on reduced portions of said studs and provided with offset arms 154 (Fig. 1) having rollers 156 (Fig. 2) at their outer end. These rollers are arranged for engagement beneath overhanging ledges 160 on the clamping plates 144 and vertical movement of the sleeves willA be thereby communicated yto the clamping plates 144 to clamp the work against the projecting members 140 and later to unclamp the work in order to release ,the same at the desired time. I The sleeves 152 are vresiliently secured on the shouldered studs 150 by means of stili1 springs 168 interposed between the upper edges of the sleeves and adjusting nuts 166 threaded on the reduced upperV ends of the studs 150 and these sleeves 152 and their arms 154 normally move Vwith said studs. The studs 150 extend through the turret and are slidably mounted in suitable bearings therein. The lower ends 162 of the studs 150 are provided with rollers 164 adapted to engage the cam track 72 so as positively to actuate the clamping members both to clamp and unclamp the work.

From an inspection of Fig. 2 it will be observed that the cam track 72 is provided with an elevated portion adjacent tol thev front of the machine so that as the corresponding work clamp vaproac'hes the front of the machine, therod 162 will be pushed upward and the 'clamping plate 144 thereby released. On the other hand, as the particular clamp which is at the front of the ma chine leaves this position the rod 162 will be pulled down to cause the clamping plate 144 firmly to contact with the tread surface of the heel under a predetermined spring pressure which may be adjusted by turning the nut 166.

After the heel has been operated upon by the rotating critter 24 and the scouring wheel 42, it is desired that it shall be automatically ejected in order to leave the work clamp empty for the insertion of a fresh piece of work. To this end an elevating means comprising three rods 170 is slidably mounted in each of the base portions 140 and the rods are connected at their lower ends to plates 172 provided with depending arms 17 8 each having a roller 175 (F ig.'5) to coact with a A projection upstanding from the stationary block 70 so that as the work is unclamped by the upward movement of the roller 164 in the cam slot 72, these rods 170 will be elevated and serve Vforcibly to raise the work above the jig pins 142.V Ejection of the work from the holder is then effected by means of an arm mounted on theupper end of a shortshaft 182 pivoted in the turret adjacent to each work holderand said shaft hasV clamped to its lower end a lever 184 provided at its outer end v186 with a roll engaging a cam track 188 (Fig. 3) formed in a portion ofthe slide 62. This cam track is shown in dotted lines in Fig. 3 and it will be observed that its shape is such that a resilient portion 190 attached to the outer end of each of the arms 180 is forciblymoved between the clamp members to eject the heel after it has been unclamped and as soon as it has been lifted from the jig pins by the rods 170. A. similar pair of ejectors is provided for each of the clamps but, because of the circular form of the larger portion of the cam track 188 and the level surface of the majority ot the block TO, they remain idle until the ivork has been operated upon by the tools 2l and 42 and is approaching,l the reloading station.

From the above description it vvill be that the opeiator vvill t the machine adjacent to the hand Wiiecl and supply Work to the open clamping device in front oi him and adjust the wheel as the occasion may require. Because of the provision ot the Oldham coupling` 9e the slight amount of adjustment ot the turretrequiied in order to compensate tor Wear ot the scouring Wheel e2 .may be readily accomplished Without interfering` with tie proper rotation oit the various vertical shafts. At the loading station the operator will place the leather portion 2t@ of the heel in an inverted position on the base clamping member 140 and Will be able readily to locate the .same thereon by means ot the engagement o'j the upstanding pins 142 Wit-h the holes 23T termed in the heel seat portion 2st@ of the heel. He Will also be able readily to locate the rubber portion oi the heel on the leather part because of similar projections 22T and recesses 22e formed thereon in a manner described in my above-mentioned Letters Patent No.'

1,613,096, granted January t, 19:27. l-lavingplaced the several parts of trie heel between the clamping' devices the turret Will be caused to move and the upper clamping,` member 144: vvill be forcibly pressed against the tread surface of the rubber portion ot the heel to hold the various parts in proper relation to the turret for presentation to the tools. It desired, a suitable adhesive may be applied to the coacting surfaces of the leather and rubber portions before they are positioned in the clamp and the clamping utilized for holding the tivo parts together during an interval sufficiently long to cause the adhesive to set. As the turret rotates through 120 degrees it ivill bring the heel Which hasY just been positioned by operator past the heel breas ing cut-ter. It the curvature ot the breast or" the lie-el does not coincide with the curvature orn the turret and hence the curvature et the path ot movement of the Work a suitable depression or projection on a cam plate 13e- *ill cause a radial movement of the Work-holding means against or ,vith tlie action of the springs 126 to correct the path of movement in order to compensate for this difference ot curvature. The turretivill then halt teinporarily under the action ot the cani 11G, the bell crank 100 and their combined action on the worm 86 to cause the turret to dwell for an interval suliiciently long to allovv the tate tliroiu i 1:2() degrees to carry the Work na the scouring Wheel l2 and it vvill be remembered that this wl eel not only rotating preferably in a direction opposite to the direction ot mifement of the turret, but is also being oscillated vertically ensure n `rear ot the Working face ot the scourtool. the nent intermittent movement ie clamp Will be released, the work lifted ell studs 1112 by means ot the action of the ejector rods 170 When litter/l by the coactiiig cani and the piece ot Work forcibly ejected trom the clamp by the swiping;l action of the sprin` 190 mounted on the arm 180. Further movement of the turret brings this carrier to the operators position.

Having described the invention, ivl'iat l claim as neiv and desire to secure by Letters Pate-nt o1 Y*he United States is 1. ln a machine tor operating on blanks, a rotatable Work-supporting turret provided 'ivitli pins to receive and position a blank upon the turret, means operable positively by the rotation ot the turret to clamp al blank on the turret and to unclainp the blank at a later time, and an ejecting device ior lifting the blank oil' the jig pins comprisingmeans movable With respect to the surface of the turret and stationary means for moving said ejecting,T device to litt the blank.

2. In a. machine for operating on blanks, a rotatable Work-supporting turret provided With pins to receive and position a blank upon the turret, a clamping device movably mounted upon the turret, a clampactuating member secured to said clamping device and extending outside the turret, acani operatively associated With said actuating member for positively actuating said clamping device to clamp av blank on the turret and later to unelamp the blank, an eject-- ing rod movably mounted on the turret to litt the blank oil2 the jig pins, and a stationary cam surface arranged to coact Wit-h said ejecting rod during rot-ation of the turret to lift the blank from the jig pins after the clamping,l device has been released.

In ay machine for operating on blanks, rotatable Work-supporting turret provided With jigpins adapted to receive and posit-ion a blank with respect to the turret, a clainping device movable toward and aivay from the turret, n'ieans actuated positively by the rotation of theA turret to move the clampingdevice to clamp and later to release the blank, elevating means movably mounted upon the turret for movement under the control ol the rotation ot the turret to lift a blank off the pins, an eject-ing member mounted for lateral movement upon the turret adjacent to the clamping device, and stationary means for operating said ejecting member upon rotation ot' the turret to push a blank laterally out of the clamping device after it has been lifted by means of the elevating means.

' 4. In a machine for operating on blanks, a rotatable work-supporting turret provided with jig pins adapted to receive and position a blank with respect to the turret, a clamping device movable toward and away from the turret, means actuated positively by rotation of the turret to move the clamping device to clamp and later to release the blank, a rod movably associated with said clamping device and arranged to contact with a fixed cam surface during the rotation of the turret thereby to lift the blank off the jig pins, a pivoted arm mounted on the turret adjacent to the clamping device, and a fixed cam surface arranged to actuate said pivoted arm upon rotation of the turret 'to push the blank laterally out of the clamping device after it has been lifted by means of said rod.

5. In a machine for operating on blanks, a conveyor, a work-clamping device carried by said conveyor, relatively fixed means for operating said clamping device positively to clamp a blank, a movably mounted Workejecting device associated with said workclamping device, and a relatively Xed'cam for operating said ejecting device positively to push a piece of work laterally out ofthe clamp after the clamp has been loosened.

6. In a machine for operating on blanks, a rotatable work-carrying turret, a workclamping device carried by said turret, a relatively i'iXed cam, a plunger coacting with said cam and arranged to actuate said workclamping device, a pivotally mounted workejecting device associated with said workclamping device and provided with an extension outside said turret, and a relatively fixed cam coacting with said extension to oscillate said ejecting device to push a piece of work laterally out of the clamp after the clamp has been loosened.

7. In a machine for operating on blanks, a conveyor provided with a device for clamping a single blank, means for operating said clamping devi-ce, a plurality of movable ej ecting devices associated with said clamping device arranged to operate upon said blank when released therefrom, said ejecting devices being mounted on said conveyor, and means for operating said ejecting devices in timed relation to the operation of said clamping device.

8. In a machine for operating on blanks,-

a conveyor provided with a device for clamping a piece of work, means for operating said clamping device, a sliding ejector rod and a pivotally mounted ejector arm movably mounted upon said turret adjacent to said clamping device, and cam surfaces for operating said ejecting` devices in timed relation to the operat-ion of said clamping device.

9. In a machine for operating on blanks, a conveyor provided with a device for clamping a piece of work, means for operating said clamping device, a plurality of movable eject-ing devices associated with said clamping device operable upon a single piece of work, and positive means for operating said ejecting devices in timed relation to one another.

10. In a machine for operating on blanks, a conveyor provided with a device for clamping a piece of work, means for operating said clamping device, a plurality of movable ejecting devices associated with said clamping device arranged to eject the piece of work which has been clamped thereby, said ejecting devices being mounted on said conveyor, and means for operating said eject-ing devices in timed relation to one another and said clamping device.

ll. In a machine for operating on blanks, a rotatable turret, a plurality of work clamping devices carried by said turret, a' tool for acting upon pieces of work held in said clamps during rotation of the turret, and means for adjusting the center of rotation of said turret to change the relation of the path of movement of the work clamped thereon with respect to said operating tool to compensate for wear of the latter.

l2. In a machine for operating on blanks, a frame, a slide on said frame, a rotatable turret pivotally mounted on said slide, a

screw for adjusting said slide in the frame,

a plurality of work-clamping devices carried by said turret, means for rotating said turret, a rotatable tool carried in said frame in a position for acting upon pieces of work held in said clamping devices during rotation of the turret, and a screw for adjusting said slide to move the center of rotation of the turret so as to change the relation of the path of movement of the pieces of work clamped on the turret wit-h respect to the rotatable tool.

13. In a machine for operating on blanks, a rotatable turret, a plurality of work clamping devices on said turret whereby pieces of work may be carried in a circular path, a tool adapted to act upon a portion of the periphery of the successive pieces of work held in saidv clamp, means for rotating said turret to carry a piece of work into engagement with and past the tool, and means for adjusting the position of the center of rotation of the turret with respect to said tool whereby the wearing away of the tool may be compensated for and its effect upon successive pieces of work kept substantially constant. l

14. In a machine for operating on blanks, a rotatable work-carrying turret, two tools for acting successively upon work carried yby said turret spaced apart around the periphery of the turret, and means for adjusting the center of rotation of the turret Ein a direction such that the relation of one of the tools to the paths of movement of successive pieces of work shall remain substantially unchanged and that the wearing away of the other tool may be compensated for so that its effect upon successive pieces of lwork shall remain substantially unchanged.

15. In a machine for operating on blanks,

a rotatable work-carrying turret, a plurality of rotatable tools mounted upon axes subbe maintained in spite of the wearing away of said latter tool.

16. In a machine for operating on blanks, an operating tool, a rotatable work-carrying turret, aA motor for driving said turret to transfer the point of operation of the tool along the work, driving connections comprising only shafts and gears between said motor and said turret, and means for adjusting the center of rotation of the turret with respect to said tool, said driving connections being constructed and arranged to allow said adjustment without disturbing the effective operating relation of the motor and the turret.

17. In a machine for operating on blanks, a frame, a slide on said frame, a rotatable work-carrying turret pivotally mounted on said slide and provided with' an actuating gear, a pinion in said slide in fixed relation to said gear to drive the same, a motor for driving said turret mounted in said frame, shafts and gears connecting the pinion and the motor, an operating tool mounted in said frame, means for moving said slide to adjust the center of rotation of the turret with respect to said tool, and an Oldham coupling in a shaft between said driving motor and the pinion on said slide constructed and arranged to allow adjustment of the center of rotation of the turret without disturbing the effective connection between the motor and the turret.

18. In a machine of the character described, a rotatable turret, a driving motor for said turret having a sha-ft with its axis substantially parallel to the axis of rotation of the turret, means for shifting the axis of rotation of theturret with respect to the u axis of the shaft of the driving motor, and

shafts and gears for connecting said shaft to said turret constructed and arranged to rotate the turret undisturbed by the shifting of the axis of rotation of the turret.

19. In a machine for operating on blanks, an annular work-carrying turret, a plurality of rotatable tools located within said annulus and disposed upon axes substantially parallel to the axis of rotation of the turret, means for rotating said turret to carry successive pieces of work past the periphery of each of said tools, means for rotating each of said tools, and means for imparting axial movement to one of said tools to distribute the wear of the work across the width of the periphery of said tool.

20. In a machine of the character described, a turret rotatable around a fixed axis, a driving motor having its shaft substantially parallel to the axis of rotation of the turret, and means for connecting said shaft of the driving motor to the turret constructed and arranged to cause the turret to move through predetermined fractions of a rotation and to dwell for a predetermined period intermediate between each of said fractional movements.

21. In a machine for scouring the breasts of unattached composite heels, a rotatable work-supporting annular turret provided with jig pins to receive and position a heel upon the turret, a clamping device arranged to hold a heel in position upon the jig pins during a partial rotation of the turret, a scouring tool within the annulus of the turret having its operative face in position to act upon the breast of a heel carried past the tool by the turret, and means for releasing the clamp and lifting the heel from the jig pins after it has been treated by said scouring tool.

22. In a machine for scouring the breasts of unattached heels, a scouring tool, a conveyor movable in a path adjacent to said scouring tool and provided with a device for clamping a single heel upon the conveyor, means for operating said clamping device for holding the heel upon the conveyor during a part of a single rotation thereof, a plurality of movable ejecting devices associated with said clamping device and operable successively Vto loosen and to eject a heel which has been held by said clamping device, and means for operating said ejecting devices in timed relation to one another.

23. In a machine for scouring the breasts of unattached heels, a rotatable turret,-a device for clamping a heel upon said turret, a scouring tool for acting upon a heel held in said clamping device during rotation of the turret, and means for adjusting the center of rotation of said turret to change the relation of the path of movement of the lieel clampecl'thereon with respect to said scouring tool to compensate for wear of the latter.

y241C. In a machine for operating on blanks, a conveyor provided with jig pins to receive and position a blank npon the eomfejfor7 means operable positively bythe movement of the conveyor to clamp a blank on the Conveyor and later to nnolamp the blank,

an ejector for lifting the blank olf the jig l0 pins comprising means movable with respect to the path of movement o' the conveyor, and stationary means for moving said ejector to lift the blank.

In testimony whereof I have signed my 15 name to this speoiication.

JOHN B. HADAWAY. 

